818118665 has 32 divisors (see below), whose sum is σ = 1224900096. Its totient is φ = 510727680.

The previous prime is 818118649. The next prime is 818118677. The reversal of 818118665 is 566811818.

It is not a de Polignac number, because 818118665 - 2⁴ = 818118649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20900 + ... + 45530.

It is an arithmetic number, because the mean of its divisors is an integer number (38278128).

Almost surely, 2^818118665 is an apocalyptic number.

It is an amenable number.

818118665 is a deficient number, since it is larger than the sum of its proper divisors (406781431).

818118665 is a wasteful number, since it uses less digits than its factorization.

818118665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24729.

The product of its digits is 92160, while the sum is 44.

The square root of 818118665 is about 28602.7737291333. The cubic root of 818118665 is about 935.2737966785.

The spelling of 818118665 in words is "eight hundred eighteen million, one hundred eighteen thousand, six hundred sixty-five".